I'm sure you have been checking out the cruise forums on the DIS. You can find cruise meets and get to know others from your cruise date! That's where I first "met" Jordan!
There are some informational threads out there - you can learn so much! You will want to read what people are planning, and then look up the info. Just like WDW, there are tips that can really make your cruise more fun!
My best tip: Make ressies for spa, Palo, excursions before you go - if you wait until you're on the ship, you will probably be disappointed. My boss did that and he came back mad that they weren't able to do anything they wanted to do because it was all taken.
Here is a thread from lbgraves, who was on our cruise. She is a mod and has alot of links gathered here - it will give you lots to do for now!
http://www.disboards.com/showthread.php?t=2068966